<!-- uniapp vue3 markdown解析 -->
<script setup>
import mathjax3 from 'markdown-it-mathjax3-pro';

import hljs from './lib/highlight/uni-highlight.min.js';
import MarkdownIt from './lib/markdown-it.min.js';

// 导入代码高亮样式
import './lib/highlight/atom-one-dark.css';

const props = defineProps({
  showLine: { default: true, type: [Boolean, String] },
  // 解析内容
  modelValue: { type: String, default: '' },
});

// 存储代码片段用于复制
const copyCodeData = [];

// 配置 markdown 解析器
const markdown = MarkdownIt({
  highlight(str, lang) {
    let preCode = '';
    try {
      preCode = hljs.highlightAuto(str).value;
    } catch {
      preCode = markdown.utils.escapeHtml(str);
    }
    const lines = preCode.split(/\n/).slice(0, -1);

    // 添加自定义行号
    const lineNumbers = lines
      .map((item, index) => {
        if (item === '') {
          return '';
        }
        return `<li><span class="line-num" data-line="${index + 1}"></span>${item}</li>`;
      })
      .join('');

    const listStyle = props.showLine
      ? '<ol style="padding: 0px 30px;">'
      : '<ol style="padding: 0px 7px;list-style:none;">';

    const htmlCode = `
      <div class="markdown-wrap">
        <div style="color: #aaa;text-align: right;font-size: 12px;padding:8px;">
          ${lang}<a class="copy-btn" code-data-index="${copyCodeData.length}" style="margin-left: 8px;">复制代码</a>
        </div>
        <pre class="hljs" style="padding:10px 8px 0;margin-bottom:5px;overflow: auto;display: block;border-radius: 5px;">
          <code>${listStyle}${lineNumbers}</ol></code>
        </pre>
      </div>
    `;

    // 存储代码片段用于复制
    copyCodeData.push(str);
    return htmlCode;
  },
  html: true,
});

// 添加数学公式支持
markdown.use(mathjax3);

/**
 * 解析 Markdown 内容
 * @param {string} value - 要解析的 Markdown 字符串
 * @returns {string} HTML 字符串
 */
const parseNodes = (value) => {
  if (!value) return '';

  // 解析<br />到\n
  const processedValue = value
    .replaceAll(/<br>|<br\/>|<br \/>/g, '\n')
    .replaceAll('&nbsp;', ' ');

  let htmlString = '';
  if (processedValue.split('```').length % 2) {
    let mdtext = processedValue;
    if (mdtext[mdtext.length - 1] !== '\n') {
      mdtext += '\n';
    }
    htmlString = markdown.render(mdtext);
  } else {
    htmlString = markdown.render(processedValue);
  }

  // 解决小程序表格边框型失效问题
  htmlString = htmlString
    .replaceAll('<table', '<table class="table"')
    .replaceAll('<tr', '<tr class="tr"')
    .replaceAll('<th>', '<th class="th">')
    .replaceAll('<td', '<td class="td"')
    .replaceAll(/<hr>|<hr\/>|<hr \/>/g, '<hr class="hr">');

  return htmlString;
};

/**
 * 处理点击事件（主要用于复制代码）
 * @param {Event} e - 点击事件对象
 */
const handleItemClick = (e) => {
  const { attrs } = e.detail?.node || {};
  if (!attrs) return;

  const { class: className, 'code-data-index': codeDataIndex } = attrs;
  if (className === 'copy-btn' && codeDataIndex !== undefined) {
    navigator.clipboard
      .writeText(copyCodeData[Number.parseInt(codeDataIndex)])
      .then(() => {
        console.log('复制成功');
      })
      .catch((error) => {
        console.error('复制失败:', error);
      });
  }
};
</script>

<template>
  <div class="ua__markdown">
    <div v-html="parseNodes(modelValue)" @click="handleItemClick"></div>
  </div>
</template>

<style lang="scss" scoped>
.ua__markdown {
  overflow: scroll;
  font-size: 14px;
  line-height: 1.5;
  word-break: break-all;
  height: 400px;
  padding: 10px;
  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-family: inherit;
    font-weight: 500;
    line-height: 1.1;
    color: inherit;
  }
  h1,
  h2,
  h3 {
    margin-top: 20px;
    margin-bottom: 10px;
  }
  h4,
  h5,
  h6 {
    margin-top: 10px;
    margin-bottom: 10px;
  }
  .h1,
  h1 {
    font-size: 36px;
  }
  .h2,
  h2 {
    font-size: 30px;
  }
  .h3,
  h3 {
    font-size: 24px;
  }
  .h4,
  h4 {
    font-size: 18px;
  }
  .h5,
  h5 {
    font-size: 14px;
  }
  .h6,
  h6 {
    font-size: 12px;
  }
  a {
    background-color: transparent;
    color: #2196f3;
    text-decoration: none;
  }
  hr,
  ::v-deep .hr {
    margin-top: 20px;
    margin-bottom: 20px;
    border: 0;
    border-top: 1px solid #e5e5e5;
  }
  img {
    max-width: 35%;
  }
  p {
    margin: 0 0 10px;
  }
  em {
    font-style: italic;
    font-weight: inherit;
  }
  ol,
  ul {
    margin-top: 0;
    margin-bottom: 10px;
    padding-left: 40px;
  }
  ol ol,
  ol ul,
  ul ol,
  ul ul {
    margin-bottom: 0;
  }
  ol ol,
  ul ol {
    list-style-type: lower-roman;
  }
  ol ol ol,
  ul ul ol {
    list-style-type: lower-alpha;
  }
  dl {
    margin-top: 0;
    margin-bottom: 20px;
  }
  dt {
    font-weight: 600;
  }
  dt,
  dd {
    line-height: 1.4;
  }
  .task-list-item {
    list-style-type: none;
  }
  .task-list-item input {
    margin: 0 0.2em 0.25em -1.6em;
    vertical-align: middle;
  }
  pre {
    position: relative;
    z-index: 11;
  }
  code,
  kbd,
  pre,
  samp {
    font-family: Menlo, Monaco, Consolas, 'Courier New', monospace;
  }
  code:not(.hljs) {
    padding: 2px 4px;
    font-size: 90%;
    color: #c7254e;
    background-color: #ffe7ee;
    border-radius: 4px;
  }
  code:empty {
    display: none;
  }
  pre code.hljs {
    color: var(--vg__text-1);
    border-radius: 16px;
    background: var(--vg__bg-1);
    font-size: 12px;
  }
  .markdown-wrap {
    font-size: 12px;
    margin-bottom: 10px;
  }
  pre.code-block-wrapper {
    background: #2b2b2b;
    color: #f8f8f2;
    border-radius: 4px;
    overflow-x: auto;
    padding: 1em;
    position: relative;
  }
  pre.code-block-wrapper code {
    padding: 0;
    font-size: inherit;
    color: inherit;
    background-color: inherit;
    border-radius: 0;
  }
  .code-block-header__copy {
    font-size: 16px;
    margin-left: 5px;
  }
  abbr[data-original-title],
  abbr[title] {
    cursor: help;
    border-bottom: 1px dotted #777;
  }
  blockquote {
    padding: 10px 20px;
    margin: 0 0 20px;
    font-size: 17.5px;
    border-left: 5px solid #e5e5e5;
  }
  blockquote ol:last-child,
  blockquote p:last-child,
  blockquote ul:last-child {
    margin-bottom: 0;
  }
  blockquote .small,
  blockquote footer,
  blockquote small {
    display: block;
    font-size: 80%;
    line-height: 1.42857143;
    color: #777;
  }
  blockquote .small:before,
  blockquote footer:before,
  blockquote small:before {
    content: '\2014 \00A0';
  }
  .blockquote-reverse,
  blockquote.pull-right {
    padding-right: 15px;
    padding-left: 0;
    text-align: right;
    border-right: 5px solid #eee;
    border-left: 0;
  }
  .blockquote-reverse .small:before,
  .blockquote-reverse footer:before,
  .blockquote-reverse small:before,
  blockquote.pull-right .small:before,
  blockquote.pull-right footer:before,
  blockquote.pull-right small:before {
    content: '';
  }
  .blockquote-reverse .small:after,
  .blockquote-reverse footer:after,
  .blockquote-reverse small:after,
  blockquote.pull-right .small:after,
  blockquote.pull-right footer:after,
  blockquote.pull-right small:after {
    content: '\00A0 \2014';
  }
  .footnotes {
    -moz-column-count: 2;
    -webkit-column-count: 2;
    column-count: 2;
  }
  .footnotes-list {
    padding-left: 2em;
  }
  table,
  ::v-deep .table {
    border-spacing: 0;
    border-collapse: collapse;
    width: 100%;
    max-width: 65em;
    overflow: auto;
    margin-top: 0;
    margin-bottom: 16px;
  }
  table tr,
  ::v-deep .table .tr {
    border-top: 1px solid #e5e5e5;
  }
  table th,
  table td,
  ::v-deep .table .th,
  ::v-deep .table .td {
    padding: 6px 13px;
    border: 1px solid #e5e5e5;
  }
  table th,
  ::v-deep .table .th {
    font-weight: 600;
    background-color: #eee;
  }
  .hljs[class*='language-']:before {
    position: absolute;
    z-index: 3;
    top: 0.8em;
    right: 1em;
    font-size: 0.8em;
    color: #999;
  }
  .hljs[class~='language-js']:before {
    content: 'js';
  }
  .hljs[class~='language-ts']:before {
    content: 'ts';
  }
  .hljs[class~='language-html']:before {
    content: 'html';
  }
  .hljs[class~='language-md']:before {
    content: 'md';
  }
  .hljs[class~='language-vue']:before {
    content: 'vue';
  }
  .hljs[class~='language-css']:before {
    content: 'css';
  }
  .hljs[class~='language-sass']:before {
    content: 'sass';
  }
  .hljs[class~='language-scss']:before {
    content: 'scss';
  }
  .hljs[class~='language-less']:before {
    content: 'less';
  }
  .hljs[class~='language-stylus']:before {
    content: 'stylus';
  }
  .hljs[class~='language-go']:before {
    content: 'go';
  }
  .hljs[class~='language-java']:before {
    content: 'java';
  }
  .hljs[class~='language-c']:before {
    content: 'c';
  }
  .hljs[class~='language-sh']:before {
    content: 'sh';
  }
  .hljs[class~='language-yaml']:before {
    content: 'yaml';
  }
  .hljs[class~='language-py']:before {
    content: 'py';
  }
  .hljs[class~='language-docker']:before {
    content: 'docker';
  }
  .hljs[class~='language-dockerfile']:before {
    content: 'dockerfile';
  }
  .hljs[class~='language-makefile']:before {
    content: 'makefile';
  }
  .hljs[class~='language-javascript']:before {
    content: 'js';
  }
  .hljs[class~='language-typescript']:before {
    content: 'ts';
  }
  .hljs[class~='language-markup']:before {
    content: 'html';
  }
  .hljs[class~='language-markdown']:before {
    content: 'md';
  }
  .hljs[class~='language-json']:before {
    content: 'json';
  }
  .hljs[class~='language-ruby']:before {
    content: 'rb';
  }
  .hljs[class~='language-python']:before {
    content: 'py';
  }
  .hljs[class~='language-bash']:before {
    content: 'sh';
  }
  .hljs[class~='language-php']:before {
    content: 'php';
  }

  // 数学公式样式
  .math.inline {
    display: inline-block;
    vertical-align: middle;
  }

  .math.block {
    display: block;
    text-align: center;
    margin: 1em 0;
  }
}
</style>
